This interactive data tool illustrates an approach to
visualizing second-by-second traffic data and emissions using web based tools.
Second-by-second vehicle locations and emissions data are stored in a database on the server
and queried to bring the data onto the client (web-browser).
For every second of real-time or simulation data data, each vehicle is plotted on the canvas object (below).
Vehicles are color coded either blue (light duty vehicles) or red (heavy duty vehicles). The small road network is shown by the white lines.
The number of vehicles, and emissions generated by all the vehicles in the study area are also plotted on the graphs below (again divided into light- and heavy-duty vehicles). The graphs illustrate the variability of emissions over time, driven by traffic activity and vehicle types. In this case, the vehicles were generated using a traffic microsimulator, but data from GPS monitoring of actual vehicles could easily be used.
For more information on the modeling approach, read the story.